src/HOL/Tools/atp_wrapper.ML
author immler@in.tum.de
Sun, 28 Jun 2009 15:01:28 +0200
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(*  Title:      HOL/Tools/atp_wrapper.ML
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    Author:     Fabian Immler, TU Muenchen
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Wrapper functions for external ATPs.
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*)
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signature ATP_WRAPPER =
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sig
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  val destdir: string ref
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  val problem_name: string ref
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  val tptp_prover_opts_full: int -> bool -> bool -> Path.T * string -> AtpManager.prover
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  val tptp_prover_opts: int -> bool -> Path.T * string -> AtpManager.prover
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  val tptp_prover: Path.T * string -> AtpManager.prover
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  val full_prover_opts: int -> bool -> Path.T * string -> AtpManager.prover
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  val full_prover: Path.T * string  -> AtpManager.prover
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  val vampire_opts: int -> bool -> AtpManager.prover
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  val vampire: AtpManager.prover
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  val vampire_opts_full: int -> bool -> AtpManager.prover
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  val vampire_full: AtpManager.prover
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  val eprover_opts: int -> bool  -> AtpManager.prover
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  val eprover: AtpManager.prover
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  val eprover_opts_full: int -> bool -> AtpManager.prover
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  val eprover_full: AtpManager.prover
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  val spass_opts: int -> bool  -> AtpManager.prover
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  val spass: AtpManager.prover
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  val remote_prover_opts: int -> bool -> string -> string -> AtpManager.prover
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  val remote_prover: string -> string -> AtpManager.prover
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  val refresh_systems: unit -> unit
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end;
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structure AtpWrapper: ATP_WRAPPER =
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struct
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(** generic ATP wrapper **)
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(* global hooks for writing problemfiles *)
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val destdir = ref "";   (*Empty means write files to /tmp*)
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val problem_name = ref "prob";
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(* basic template *)
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fun external_prover relevance_filter preparer writer (cmd, args) find_failure produce_answer
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  timeout axiom_clauses filtered_clauses name subgoalno goal =
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  let
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    (* path to unique problem file *)
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    val destdir' = ! destdir
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    val problem_name' = ! problem_name
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    fun prob_pathname nr =
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      let val probfile = Path.basic (problem_name' ^ serial_string () ^ "_" ^ string_of_int nr)
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      in if destdir' = "" then File.tmp_path probfile
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        else if File.exists (Path.explode (destdir'))
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        then Path.append  (Path.explode (destdir')) probfile
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        else error ("No such directory: " ^ destdir')
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      end
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    (* get clauses and prepare them for writing *)
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    val (ctxt, (chain_ths, th)) = goal
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    val thy = ProofContext.theory_of ctxt
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    val chain_ths = map (Thm.put_name_hint ResReconstruct.chained_hint) chain_ths
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    val goal_cls = #1 (ResAxioms.neg_conjecture_clauses th subgoalno)
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      handle THM ("assume: variables", _, _) =>
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        error "Sledgehammer: Goal contains type variables (TVars)"
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    val _ = app (fn th => Output.debug (fn _ => Display.string_of_thm th)) goal_cls
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    val the_filtered_clauses =
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      case filtered_clauses of
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          NONE => relevance_filter goal goal_cls
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        | SOME fcls => fcls
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    val the_axiom_clauses =
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      case axiom_clauses of
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          NONE => the_filtered_clauses
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        | SOME axcls => axcls
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    val (thm_names, clauses) = preparer goal_cls chain_ths the_axiom_clauses the_filtered_clauses thy
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    (* write out problem file and call prover *)
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    val probfile = prob_pathname subgoalno
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    val fname = File.platform_path probfile
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    val _ = writer fname clauses
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    val cmdline =
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      if File.exists cmd then "exec " ^ File.shell_path cmd ^ " " ^ args
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      else error ("Bad executable: " ^ Path.implode cmd)
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    val (proof, rc) = system_out (cmdline ^ " " ^ fname)
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    (* if problemfile has not been exported, delete problemfile; otherwise export proof, too *)
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    val _ =
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      if destdir' = "" then OS.FileSys.remove fname
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      else
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        let val out = TextIO.openOut (fname ^ "_proof")
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        val _ = TextIO.output (out, proof)
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        in TextIO.closeOut out end
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    (* check for success and print out some information on failure *)
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    val failure = find_failure proof
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    val success = rc = 0 andalso is_none failure
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    val message =
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      if is_some failure then "External prover failed."
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      else if rc <> 0 then "External prover failed: " ^ proof
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      else "Try this command: " ^ produce_answer name (proof, thm_names, ctxt, th, subgoalno)
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    val _ = Output.debug (fn () => "Sledgehammer response (rc = " ^ string_of_int rc ^ "):\n" ^ proof)
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  in (success, message, proof, thm_names, the_filtered_clauses) end;
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(** common provers **)
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(* generic TPTP-based provers *)
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fun tptp_prover_opts_full max_new theory_const full command timeout ax_clauses fcls name n goal =
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  external_prover
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  (ResAtp.get_relevant max_new theory_const)
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  (ResAtp.prepare_clauses false)
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  (ResHolClause.tptp_write_file (AtpManager.get_full_types()))
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  command
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  ResReconstruct.find_failure
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  (if full then ResReconstruct.structured_proof else ResReconstruct.lemma_list_tstp)
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  timeout ax_clauses fcls name n goal;
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(*arbitrary ATP with TPTP input/output and problemfile as last argument*)
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fun tptp_prover_opts max_new theory_const =
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  tptp_prover_opts_full max_new theory_const false;
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fun tptp_prover x = tptp_prover_opts 60 true x;
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(*for structured proofs: prover must support TSTP*)
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fun full_prover_opts max_new theory_const =
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  tptp_prover_opts_full max_new theory_const true;
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fun full_prover x = full_prover_opts 60 true x;
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(* Vampire *)
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(*NB: Vampire does not work without explicit timelimit*)
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fun vampire_opts max_new theory_const timeout = tptp_prover_opts
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  max_new theory_const
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  (Path.explode "$VAMPIRE_HOME/vampire",
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               ("--output_syntax tptp --mode casc -t " ^ string_of_int timeout))
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  timeout;
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val vampire = vampire_opts 60 false;
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fun vampire_opts_full max_new theory_const timeout = full_prover_opts
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  max_new theory_const
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  (Path.explode "$VAMPIRE_HOME/vampire",
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               ("--output_syntax tptp --mode casc -t " ^ string_of_int timeout))
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  timeout;
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val vampire_full = vampire_opts_full 60 false;
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(* E prover *)
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fun eprover_opts max_new theory_const timeout = tptp_prover_opts
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  max_new theory_const
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  (Path.explode "$E_HOME/eproof",
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    "--tstp-in --tstp-out -l5 -xAutoDev -tAutoDev --silent --cpu-limit=" ^ string_of_int timeout)
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  timeout;
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val eprover = eprover_opts 100 false;
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fun eprover_opts_full max_new theory_const timeout = full_prover_opts
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  max_new theory_const
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  (Path.explode "$E_HOME/eproof",
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    "--tstp-in --tstp-out -l5 -xAutoDev -tAutoDev --silent --cpu-limit=" ^ string_of_int timeout)
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  timeout;
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val eprover_full = eprover_opts_full 100 false;
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(* SPASS *)
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fun spass_opts max_new theory_const timeout ax_clauses fcls name n goal = external_prover
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  (ResAtp.get_relevant max_new theory_const)
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  (ResAtp.prepare_clauses true)
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  (ResHolClause.dfg_write_file (AtpManager.get_full_types()))
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  (Path.explode "$SPASS_HOME/SPASS",
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    "-Auto -SOS=1 -PGiven=0 -PProblem=0 -Splits=0 -FullRed=0 -DocProof -TimeLimit=" ^ string_of_int timeout)
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  ResReconstruct.find_failure
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  ResReconstruct.lemma_list_dfg
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  timeout ax_clauses fcls name n goal;
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val spass = spass_opts 40 true;
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(* remote prover invocation via SystemOnTPTP *)
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val systems =
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  Synchronized.var "atp_wrapper_systems" ([]: string list);
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fun get_systems () =
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  let
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    val (answer, rc) = system_out (("$ISABELLE_HOME/lib/scripts/SystemOnTPTP" |>
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      Path.explode |> File.shell_path) ^ " -w")
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  in
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    if rc <> 0 then error ("Get available systems from SystemOnTPTP:\n" ^ answer)
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    else split_lines answer
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  end;
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fun refresh_systems () = Synchronized.change systems (fn _ =>
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  get_systems());
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fun get_system prefix = Synchronized.change_result systems (fn systems =>
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  let val systems = if null systems then get_systems() else systems
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  in (find_first (String.isPrefix prefix) systems, systems) end);
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fun remote_prover_opts max_new theory_const args prover_prefix timeout =
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  let val sys = case get_system prover_prefix of
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      NONE => error ("No system like " ^ quote prover_prefix ^ " at SystemOnTPTP")
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    | SOME sys => sys
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  in tptp_prover_opts max_new theory_const
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    (Path.explode "$ISABELLE_HOME/lib/scripts/SystemOnTPTP",
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      args ^ " -t " ^ string_of_int timeout ^ " -s " ^ sys) timeout end;
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val remote_prover = remote_prover_opts 60 false;
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end;
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